Exhaust pipe of vehicle
a technology of exhaust pipe and vehicle, which is applied in the direction of machines/engines, mechanical equipment, separation processes, etc., can solve the problem that the exhaust gas purification is not appropriately done in the conventional exhaust pipe system
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embodiment 1
[0016]FIG. 1 shows a vertical cross-sectional view of the exhaust pipe connected to a housing. More precisely, in FIG. 1, a circular cylindrical housing 2 formed by a spinning process or the like connects to the exhaust pipe having a circular cross section, so that part of the pipe conduit can be created. The housing 2 forms a storage space 21 having a diameter larger than the diameter of the exhaust pipe 1 and connecting to the rear connection part 22. The connection part 22 is tapered toward the downstream exhaust pipe 12 and the diameter of the connection part 22 is gradually reduced and its opening is welded into the opening of the downstream exhaust pipe 12. And a known circular cylindrical honeycomb catalyst carrier 3 is stored in the storage space 21 so that the outer surface of the catalyst carrier 3 is in contact with the inner surface of the storage space 21.
[0017]In Embodiment 1, an expanded portion 23 having a diameter larger than the diameter of the storage space 21 is ...
embodiment 2
[0019]In this Embodiment, a connection part 24 having a diameter which is gradually reduced and tapered down toward the upstream exhaust pipe 11 is formed on the front face of the storage space 21 of the housing 2, and the opening of the connection part 24 is welded into the opening of the upstream exhaust pipe 11. An expanded portion 25 having the same structure as the expanded portion described in Embodiment 1 is connectingly formed on the rear side of the storage space 21, and the opening of the expanded portion 25 is welded into the opening of the downstream exhaust pipe 12.
[0020]By providing the expanded portion 25 on the rear face of the storage space 21, a decrease in flow velocity and the diffusion of the exhaust gas (indicated by a white arrow in FIG. 2) in the expanded portion affect the upstream storage space 21. Thus, the exhaust gas flows almost evenly into the inner and outer circumferences of the catalyst carrier 3 in the storage space 21 with the appropriate velocity...
embodiment 3
[0021]As shown in FIG. 3, the expanded portions 23, 25 are respectively provided on the front face and rear face of the storage space 21 of the housing 2 so that the exhaust gas can be purified more effectively by synergetic effect of Embodiments 1 and 2.
Other Embodiments
[0022]The opening edge of the expanded portions 23, 25 respectively connected to the exhaust pipe 1 is formed so as to create a continuous curved surface. Thus, the exhaust gas can smoothly flow into the expanded portion 23 or flows out of the expanded portion 25. Furthermore, the diameter of the entire circumference of the expanded portion 23, 25 is not necessarily larger than the diameter of the storage space 21. In other words, the diameter of the expanded portions 23, 25 can only be partially larger than that of the storage space 21.
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Abstract
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